现浇与预制再生混凝土框架结构抗震性能对比分析

发布时间：2018-02-28 06:11

本文关键词： 再生混凝土现浇预制振动台试验抗震性能　出处：《东南大学学报(自然科学版)》2014年01期 　论文类型：期刊论文

【摘要】：分别对1/4缩尺且平立面相同的现浇和预制再生混凝土框架结构模型进行了振动台试验,对比研究了2个再生混凝土框架的自振频率、楼层剪力、楼层位移、层间位移等动力反应以及刚度退化、延性等抗震性能.对比分析表明,在弹性和弹塑性阶段前期,随着台面输入加速度峰值的增加,2个模型均呈现自振频率下降、楼层剪力和位移反应逐渐增大的趋势,且动力反应变化趋势和抗震性能差别不大;在弹塑性阶段后期,预制框架后浇节点破坏程度较明显,结构承载力低于现浇框架结构,且刚度退化更为迅速,层间位移较现浇框架结构明显偏大.预制再生混凝土框架抗震能力总体略差于现浇框架,但施工方式的不同对结构延性系数影响不明显.
[Abstract]:The shaking table tests of cast-in-situ and precast recycled concrete frame structure models with 1/4 scale and the same flat elevation were carried out, and the natural vibration frequency, floor shear force, floor displacement of two recycled concrete frames were compared and studied. Dynamic responses such as interstory displacement, stiffness degradation, ductility and so on. The comparative analysis shows that in the early stage of elastic and elastoplastic stage, with the increase of the peak of the input acceleration of the Mesa, the natural vibration frequency of the two models decreases. The shear and displacement responses of the floor are gradually increasing, and the dynamic response trend and seismic performance are not different. In the later stage of elastic-plastic stage, the failure degree of post-cast-in-place joints of precast frame is obvious, and the bearing capacity of the structure is lower than that of cast-in-place frame structure. The stiffness degradation is more rapid, the floor displacement is obviously larger than that of cast-in-place frame structure, and the seismic capacity of precast recycled concrete frame is slightly worse than that of cast-in-place frame, but the difference of construction mode has no obvious influence on the ductility coefficient of the structure.
【作者单位】：同济大学建筑工程系;
【基金】：国家自然科学基金资助项目(51178340,51325802)
【分类号】：TU375.4;TU352.11

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